RT Journal Article SR Electronic T1 On the mean free path of a molecule JF American Journal of Science JO Am J Sci FD American Journal of Science SP 222 OP 224 DO 10.2475/ajs.s3-19.111.222 VO s3-19 IS 111 A1 Hodges, N. D. C. YR 1880 UL http://www.ajsonline.org/content/s3-19/111/222.abstract AB